飞机焦点的位置（）
A.随仰角变化而改变
B.不随仰角变化而改变
C.随滚转角变化而改变
参考答案：B
能增加分散介质黏度的附加剂（）
A．助悬剂
B．润湿剂
C．絮凝剂
D．反絮凝剂
E．稳定剂
词汇。根据句意及所给首字母完成下列句子。
1. You room is so dirty. Please c______it now.
2. Could you take a picture for us? Here is the c______.
3. There is a supermarket near my home. Let's go s______.
4. The family live in an a______on Renmin Road.
5. He often goes to the l______to borrow( 借) some books.
